Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '015263bf2dec8b7aca72fd3503d9b65b9350b7f2cdb66aae056541aad2422be9' 
  AND token = '7SqImar5FGnUjD55WD8JQDwtOOaRxHNgA/AUp1XYCTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}